Electric heater



Patented J 11116 13 UNITED STATES FRANK G. VAN DYKE, OF DETROIT,MICHIGAN.

ELECTRIC HEATER.

Application filed December 19, 1921. Serial No.' 523,445.

To all whom it may concern I Be it known that LFRANK G. VAN DYKE.

a citizen of the United States. and residing at Detroit. in the countyof Wayne and State of Michigamhave invented'a new and Improved ElectricHeater, of which the following is a specification.

This invention relates to electric heaters, especially to those whichare intended for heating rooms of dwellings and offices where only amoderate amount of heat is required, and its object is to provide aconstruction of this character which can be produced at low cost, whichwill be compact, which will have long life, and which can be easilyrepaired.

This invention consists in an electric heater comprising a base, top andshell. a series of upright supporting strips of nonconducting materialssuch as asbestos board, spiders to support the upper and lower ends ofthe supporting strips so as to hold them evenly spaced from each otherand from the shell and preferably radiating from a common center, andresistance wire extending around the supporting strips and preferablymounted in notches in the outer edges thereof, the wire beingpreferablycoiled in order to obtain the necessary length.

It further consists in the details of construction illustrated in theaccompanying drawing and particularly pointed out in the claims.

In the drawing, Fig. 1 is a central vertical section of this improvedheater, the support for the wire being shown in elevation. Fig. 2 is aplan of the heater with the top removed, the shell being shown inhorizontal section. I

Similar reference characters refer to like parts throughout the severalviews.

The base 1 and top 2 of this heater are preferably metal stampings,properly perforated to permit free passage of air. as shown in Fig. 2.The shell 3 is of sheet metal and these three parts are secured togetherwith a bolt 4.- having a nut 5 at one end. Legs 6 may be attached to thebase, in any desired manner or formed integral therewith.

The resistance wire is preferably in the form of a coil 7 mounted in thenotches 8 in the upright strips 9 of asbestos board or other heatresistance non-conducting material. Any number of these strips may beused, but I prefer three, arranged radially to Specification of LettersPatent. Patented June 13, 1922.

the bolt 4 and evenly spaced therefrom and from each other. Small sheetmetal. spiders 10 and 11 may be employed to support these strips, thecenters of the spiders being formed. with holes to receive the bolt 4-and the ends of the arms being formed with cars 13 to which the strips 9may be attached in any desired manner, eyelets 14 being shown.

The circuit Wires 15 and 16 extend through the insulating eyelet 17 inthe base 1 and one wire connects to the lower end of the resistance wireat a bolt 18 passing through a strip 9. The upper end 19 of the windingis preferably passed through a hole 20 in another strip and is then leddown to the hole 22 in a third strip and then to the screw 23 to whichthe other circuit wire is attached. This positions these straightportions some distance from the coils and avoids the danger of shortcircuiting.

The upper spider 10 may have a notch 24 (Fig. 2), extending out from itscentral hole 25 to receive the tongue 26 extending down from the top 2,as shown in Fig. 1, which prevents the wire-support from turning on thebolt 4. These spiders are formed with hubs 27 and 28 which engage thetop 2 and bottom 1 and thus tend to hold this support firmly inposition. Y

The details and proportions of the several parts of this heater may allbe changed by those skilled in the art without departing from the spiritof my invention as set forth in the following claims.

I claim 1. In an electric heater, the combination of a top, a base and ashell between them,

a bolt connecting thetop and bottom, a pair of spiders mounted on saidbolt and having arms, one of said spiders being located adjacent the topand the other adjacent the base, a series of non-conducting stripsextending between the spiders and attached to the ends of the armsthereof, said strips having notches in their outer upright edges,resistance wire extending around said strips and fittingin said notches,and conductor wires attached to the ends of the resistance wires.

2. In an electric heater. the combination of a top, a base and a shellbetween them, a bolt connecting the top andbottom, a pair of spidersmounted on said bolt and having arms, one of said spiders being locatedad jacent the top and the other adjacent the base, a series ofnon-conducting strips ex tending between the spiders and attached to theends of the arms thereof, said strips having notches in their outerupright edges, resistance wire extending around said strips and fittingin said notches, and conductor wires attached to the ends of theresistance wires, the upper spider and said top having interengagingparts to prevent the wire support from turning.

3. In an electric heater, the combination of a top, a base and a shellbetween them, a bolt connecting the top and bottom, a pair of spidersmounted on said bolt and having arms, one of said spiders being locatedadjaeent the top and the other adjacent the base, a series ofnon-conducting strips extending between the spiders and attached to theends of the arms thereof, said strips having notches in their outerupright edges, resistance wire extending around said. strips and fittingin said notches, and conductor wires attached to the ends of theresistance wires, the resistance wire having one end extending through ahole near the top in one strip, then extending down through a hole in asecond strip near its inner edge and bottom and then across betweenstrips to the end of a conductor wire.

FRANK G. VAN DYKE.

